1. Mai will finish cooking, then she will phone us. -> after...... ->before..... 2. I tidied the room after the guests had come home. ->when.... 3. I do morning exercises, then have breakfast. -> after...... 4. My little Brother has cried for half an hour. ->........... 5. Five years ago, i began learning how to use computer . ->.......

1. After finishing cooking, Mai will phone us. 

Before phoning us, Mai will finish cooking.

2. When the guests had come home, i tidied the room. 

3. After doing morning exercises, i have breakfast. 

4. It's an hour since my little brother cried. 

5. I have learnt how to use computer for five years.

1. - After finishing cooking, Mai will phone us.

   - Before Mai phone us, she will have finished cooking.

2. When I tidied the room, the guests had come home.

3. After doing morning exercises, I have breakfast.

4. My little brother started to cry half an hour ago.

5. I have learned how to use computer for five years.